Здравствуйте, уважаемые форумчане. Сейчас пытаюсь написать программу, которая будет сравнивать аудиозаписи по спектрограммам. На сегодня программа открывает аудиофайлы форматов WAV и MP3, проигрывает их и выводит спектрограммы. Но никак не пойму, как мне эти спектры сравнить между собой. Я прочитал множество теоретических статей об использовании преобразования Фурье. На данный момент у меня вопрос конкретно по коду. Как можно "вытащить" те или иные параметры в C# для сравнения.
Использую библиотеку
NAudio.
Вот мой основной класс:
| C# |
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| using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace Tutorial11
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private NAudio.Wave.BlockAlignReductionStream stream = null;
private NAudio.Wave.DirectSoundOut output = null;
private void openButton_Click(object sender, EventArgs e)
{
OpenFileDialog open = new OpenFileDialog();
open.Filter = "Audio file (*.mp3;*.wav)|*.mp3; *.wav;";
if (open.ShowDialog() != DialogResult.OK) return;
DisposeWave();
if (open.FileName.EndsWith(".mp3"))
{
customWaveViewer1.WaveStream = NAudio.Wave.WaveFormatConversionStream.CreatePcmStream(new NAudio.Wave.Mp3FileReader(open.FileName));
customWaveViewer1.FitToScreen();
NAudio.Wave.WaveStream pcm = NAudio.Wave.WaveFormatConversionStream.CreatePcmStream(new NAudio.Wave.Mp3FileReader(open.FileName));
stream = new NAudio.Wave.BlockAlignReductionStream(pcm);
}
else if (open.FileName.EndsWith(".wav"))
{
customWaveViewer1.WaveStream = new NAudio.Wave.WaveFileReader(open.FileName);
customWaveViewer1.FitToScreen();
NAudio.Wave.WaveStream pcm = new NAudio.Wave.WaveChannel32(new NAudio.Wave.WaveFileReader(open.FileName));
stream = new NAudio.Wave.BlockAlignReductionStream(pcm);
}
else throw new InvalidOperationException("Not a correct audio file type.");
output = new NAudio.Wave.DirectSoundOut();
output.Init(stream);
output.Play();
pauseButton1.Enabled = true;
}
private void pauseButton1_Click(object sender, EventArgs e)
{
if (output != null)
{
if (output.PlaybackState == NAudio.Wave.PlaybackState.Playing) output.Pause();
else if (output.PlaybackState == NAudio.Wave.PlaybackState.Paused) output.Play();
}
}
private void compareButton_Click(object sender, EventArgs e)
{
OpenFileDialog open = new OpenFileDialog();
open.Filter = "Audio file (*.mp3;*.wav)|*.mp3; *.wav;";
if (open.ShowDialog() != DialogResult.OK) return;
DisposeWave();
if (open.FileName.EndsWith(".mp3"))
{
customWaveViewer2.WaveStream = NAudio.Wave.WaveFormatConversionStream.CreatePcmStream(new NAudio.Wave.Mp3FileReader(open.FileName));
customWaveViewer2.FitToScreen();
NAudio.Wave.WaveStream pcm = NAudio.Wave.WaveFormatConversionStream.CreatePcmStream(new NAudio.Wave.Mp3FileReader(open.FileName));
stream = new NAudio.Wave.BlockAlignReductionStream(pcm);
}
else if (open.FileName.EndsWith(".wav"))
{
customWaveViewer2.WaveStream = new NAudio.Wave.WaveFileReader(open.FileName);
customWaveViewer2.FitToScreen();
NAudio.Wave.WaveStream pcm = new NAudio.Wave.WaveChannel32(new NAudio.Wave.WaveFileReader(open.FileName));
stream = new NAudio.Wave.BlockAlignReductionStream(pcm);
}
else throw new InvalidOperationException("Not a correct audio file type.");
output = new NAudio.Wave.DirectSoundOut();
output.Init(stream);
output.Play();
}
private void DisposeWave()
{
if (output != null)
{
if (output.PlaybackState == NAudio.Wave.PlaybackState.Playing)
{
output.Stop();
}
output.Dispose();
output = null;
}
if (stream != null)
{
stream.Dispose();
stream = null;
}
}
private void Tutorial11_FormClosing(object sender, FormClosingEventArgs e)
{
DisposeWave();
}
}
} |
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